text: * [https://www.ashrae.org/technical-resources/bookstore/standards-62-1-62-2 ASHRAE Standard 62.1 – Ventilation for Acceptable Indoor Air Quality]
  * [https://www.ashrae.org/technical-resources/bookstore/standards-62-1-62-2 ASHRAE Standard 62.2 – Ventilation for Acceptable Indoor Air Quality in Residential Buildings]